Home / 85,587.78-128,382.03-56,191.62

Finding the Fourth Proportional to 85,587.78, 128,382.03 and 56,191.62

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Solution

The fourth proportional to 85,587.78, 128,382.03 and 56,191.62 is: 84,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,587.78 : 128,382.03 = 56,191.62 : x
  2. Step 2: Convert to fraction form
    85,587.78/128,382.03 = 56,191.62/x
  3. Step 3: Cross multiply
    85,587.78x = 128,382.03 × 56,191.62
  4. Step 4: Simplify right side
    85,587.78x = 7,213,994,244.59
  5. Step 5: Solve for x
    x = 7,213,994,244.59/85,587.78
  6. Step 6: Final answer
    x = 84,287.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.